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Consider a slimmer HTML representation for videos
Closed, ResolvedPublic

Description

Right now the output of [[File:Sneak Preview - Wikipedia VisualEditor.webm|thumb|450px|Video!]] is 15 KiB in Parser HTML and 10 KiB in Parsoid HTML:

Parser HTML, 2018: 15,271 bytes

<div id="mwe_player_1" class="PopUpMediaTransform" style="width:450px;"
	videopayload="<div class=&quot;mediaContainer&quot; style=&quot;width:854px&quot;><video id=&quot;mwe_player_2&quot; poster=&quot;https://upload.wikimedia.org/wikipedia/commons/thumb/c/c8/Sneak_Preview_-_Wikipedia_VisualEditor.webm/854px--Sneak_Preview_-_Wikipedia_VisualEditor.webm.jpg&quot; controls=&quot;&quot; preload=&quot;none&quot; autoplay=&quot;&quot; style=&quot;width:854px;height:480px&quot; class=&quot;kskin&quot; data-durationhint=&quot;61.068&quot; data-startoffset=&quot;0&quot; data-mwtitle=&quot;Sneak_Preview_-_Wikipedia_VisualEditor.webm&quot; data-mwprovider=&quot;wikimediacommons&quot;><source src=&quot;https://upload.wikimedia.org/wikipedia/commons/transcoded/c/c8/Sneak_Preview_-_Wikipedia_VisualEditor.webm/Sneak_Preview_-_Wikipedia_VisualEditor.webm.480p.webm&quot; type=&quot;video/webm; codecs=&amp;quot;vp8, vorbis&amp;quot;&quot; data-title=&quot;SD WebM (480P)&quot; data-shorttitle=&quot;WebM 480P&quot; data-transcodekey=&quot;480p.webm&quot; data-width=&quot;854&quot; data-height=&quot;480&quot; data-bandwidth=&quot;1088376&quot; data-framerate=&quot;23.976&quot;/><source src=&quot;https://upload.wikimedia.org/wikipedia/commons/transcoded/c/c8/Sneak_Preview_-_Wikipedia_VisualEditor.webm/Sneak_Preview_-_Wikipedia_VisualEditor.webm.720p.webm&quot; type=&quot;video/webm; codecs=&amp;quot;vp8, vorbis&amp;quot;&quot; data-title=&quot;HD WebM (720P)&quot; data-shorttitle=&quot;WebM 720P&quot; data-transcodekey=&quot;720p.webm&quot; data-width=&quot;1280&quot; data-height=&quot;720&quot; data-bandwidth=&quot;2075432&quot; data-framerate=&quot;23.976&quot;/><source src=&quot;https://upload.wikimedia.org/wikipedia/commons/transcoded/c/c8/Sneak_Preview_-_Wikipedia_VisualEditor.webm/Sneak_Preview_-_Wikipedia_VisualEditor.webm.1080p.webm&quot; type=&quot;video/webm; codecs=&amp;quot;vp8, vorbis&amp;quot;&quot; data-title=&quot;Full HD WebM (1080P)&quot; data-shorttitle=&quot;WebM 1080P&quot; data-transcodekey=&quot;1080p.webm&quot; data-width=&quot;1920&quot; data-height=&quot;1080&quot; data-bandwidth=&quot;3656152&quot; data-framerate=&quot;23.976&quot;/><source src=&quot;https://upload.wikimedia.org/wikipedia/commons/c/c8/Sneak_Preview_-_Wikipedia_VisualEditor.webm&quot; type=&quot;video/webm; codecs=&amp;quot;vp8, vorbis&amp;quot;&quot; data-title=&quot;Original WebM file, 1,920 × 1,080 (5.44 Mbps)&quot; data-shorttitle=&quot;WebM source&quot; data-width=&quot;1920&quot; data-height=&quot;1080&quot; data-bandwidth=&quot;5440483&quot; data-framerate=&quot;23.976&quot;/><source src=&quot;https://upload.wikimedia.org/wikipedia/commons/transcoded/c/c8/Sneak_Preview_-_Wikipedia_VisualEditor.webm/Sneak_Preview_-_Wikipedia_VisualEditor.webm.160p.webm&quot; type=&quot;video/webm; codecs=&amp;quot;vp8, vorbis&amp;quot;&quot; data-title=&quot;Low bandwidth WebM (160P)&quot; data-shorttitle=&quot;WebM 160P&quot; data-transcodekey=&quot;160p.webm&quot; data-width=&quot;284&quot; data-height=&quot;160&quot; data-bandwidth=&quot;236832&quot; data-framerate=&quot;23.976&quot;/><source src=&quot;https://upload.wikimedia.org/wikipedia/commons/transcoded/c/c8/Sneak_Preview_-_Wikipedia_VisualEditor.webm/Sneak_Preview_-_Wikipedia_VisualEditor.webm.240p.webm&quot; type=&quot;video/webm; codecs=&amp;quot;vp8, vorbis&amp;quot;&quot; data-title=&quot;Small WebM (240P)&quot; data-shorttitle=&quot;WebM 240P&quot; data-transcodekey=&quot;240p.webm&quot; data-width=&quot;426&quot; data-height=&quot;240&quot; data-bandwidth=&quot;330032&quot; data-framerate=&quot;23.976&quot;/><source src=&quot;https://upload.wikimedia.org/wikipedia/commons/transcoded/c/c8/Sneak_Preview_-_Wikipedia_VisualEditor.webm/Sneak_Preview_-_Wikipedia_VisualEditor.webm.360p.webm&quot; type=&quot;video/webm; codecs=&amp;quot;vp8, vorbis&amp;quot;&quot; data-title=&quot;WebM (360P)&quot; data-shorttitle=&quot;WebM 360P&quot; data-transcodekey=&quot;360p.webm&quot; data-width=&quot;640&quot; data-height=&quot;360&quot; data-bandwidth=&quot;576568&quot; data-framerate=&quot;23.976&quot;/><track src=&quot;https://commons.wikimedia.org/w/index.php?title=TimedText:Sneak_Preview_-_Wikipedia_VisualEditor.webm.bn.srt&amp;amp;action=raw&amp;amp;ctype=text%2Fx-srt&quot; kind=&quot;subtitles&quot; type=&quot;text/x-srt&quot; srclang=&quot;bn&quot; label=&quot;বাংলা (bn) subtitles&quot; data-mwtitle=&quot;TimedText:Sneak_Preview_-_Wikipedia_VisualEditor.webm.bn.srt&quot; data-mwprovider=&quot;local&quot; data-dir=&quot;ltr&quot;/><track src=&quot;https://commons.wikimedia.org/w/index.php?title=TimedText:Sneak_Preview_-_Wikipedia_VisualEditor.webm.ca.srt&amp;amp;action=raw&amp;amp;ctype=text%2Fx-srt&quot; kind=&quot;subtitles&quot; type=&quot;text/x-srt&quot; srclang=&quot;ca&quot; label=&quot;català (ca) subtitles&quot; data-mwtitle=&quot;TimedText:Sneak_Preview_-_Wikipedia_VisualEditor.webm.ca.srt&quot; data-mwprovider=&quot;local&quot; data-dir=&quot;ltr&quot;/><track src=&quot;https://commons.wikimedia.org/w/index.php?title=TimedText:Sneak_Preview_-_Wikipedia_VisualEditor.webm.cs.srt&amp;amp;action=raw&amp;amp;ctype=text%2Fx-srt&quot; kind=&quot;subtitles&quot; type=&quot;text/x-srt&quot; srclang=&quot;cs&quot; label=&quot;čeština (cs) subtitles&quot; data-mwtitle=&quot;TimedText:Sneak_Preview_-_Wikipedia_VisualEditor.webm.cs.srt&quot; data-mwprovider=&quot;local&quot; data-dir=&quot;ltr&quot;/><track src=&quot;https://commons.wikimedia.org/w/index.php?title=TimedText:Sneak_Preview_-_Wikipedia_VisualEditor.webm.en.srt&amp;amp;action=raw&amp;amp;ctype=text%2Fx-srt&quot; kind=&quot;subtitles&quot; type=&quot;text/x-srt&quot; srclang=&quot;en&quot; label=&quot;English (en) subtitles&quot; data-mwtitle=&quot;TimedText:Sneak_Preview_-_Wikipedia_VisualEditor.webm.en.srt&quot; data-mwprovider=&quot;local&quot; data-dir=&quot;ltr&quot;/><track src=&quot;https://commons.wikimedia.org/w/index.php?title=TimedText:Sneak_Preview_-_Wikipedia_VisualEditor.webm.es.srt&amp;amp;action=raw&amp;amp;ctype=text%2Fx-srt&quot; kind=&quot;subtitles&quot; type=&quot;text/x-srt&quot; srclang=&quot;es&quot; label=&quot;español (es) subtitles&quot; data-mwtitle=&quot;TimedText:Sneak_Preview_-_Wikipedia_VisualEditor.webm.es.srt&quot; data-mwprovider=&quot;local&quot; data-dir=&quot;ltr&quot;/><track src=&quot;https://commons.wikimedia.org/w/index.php?title=TimedText:Sneak_Preview_-_Wikipedia_VisualEditor.webm.fi.srt&amp;amp;action=raw&amp;amp;ctype=text%2Fx-srt&quot; kind=&quot;subtitles&quot; type=&quot;text/x-srt&quot; srclang=&quot;fi&quot; label=&quot;suomi (fi) subtitles&quot; data-mwtitle=&quot;TimedText:Sneak_Preview_-_Wikipedia_VisualEditor.webm.fi.srt&quot; data-mwprovider=&quot;local&quot; data-dir=&quot;ltr&quot;/><track src=&quot;https://commons.wikimedia.org/w/index.php?title=TimedText:Sneak_Preview_-_Wikipedia_VisualEditor.webm.fr.srt&amp;amp;action=raw&amp;amp;ctype=text%2Fx-srt&quot; kind=&quot;subtitles&quot; type=&quot;text/x-srt&quot; srclang=&quot;fr&quot; label=&quot;français (fr) subtitles&quot; data-mwtitle=&quot;TimedText:Sneak_Preview_-_Wikipedia_VisualEditor.webm.fr.srt&quot; data-mwprovider=&quot;local&quot; data-dir=&quot;ltr&quot;/><track src=&quot;https://commons.wikimedia.org/w/index.php?title=TimedText:Sneak_Preview_-_Wikipedia_VisualEditor.webm.gl.srt&amp;amp;action=raw&amp;amp;ctype=text%2Fx-srt&quot; kind=&quot;subtitles&quot; type=&quot;text/x-srt&quot; srclang=&quot;gl&quot; label=&quot;galego (gl) subtitles&quot; data-mwtitle=&quot;TimedText:Sneak_Preview_-_Wikipedia_VisualEditor.webm.gl.srt&quot; data-mwprovider=&quot;local&quot; data-dir=&quot;ltr&quot;/><track src=&quot;https://commons.wikimedia.org/w/index.php?title=TimedText:Sneak_Preview_-_Wikipedia_VisualEditor.webm.he.srt&amp;amp;action=raw&amp;amp;ctype=text%2Fx-srt&quot; kind=&quot;subtitles&quot; type=&quot;text/x-srt&quot; srclang=&quot;he&quot; label=&quot;עברית (he) subtitles&quot; data-mwtitle=&quot;TimedText:Sneak_Preview_-_Wikipedia_VisualEditor.webm.he.srt&quot; data-mwprovider=&quot;local&quot; data-dir=&quot;rtl&quot;/><track src=&quot;https://commons.wikimedia.org/w/index.php?title=TimedText:Sneak_Preview_-_Wikipedia_VisualEditor.webm.it.srt&amp;amp;action=raw&amp;amp;ctype=text%2Fx-srt&quot; kind=&quot;subtitles&quot; type=&quot;text/x-srt&quot; srclang=&quot;it&quot; label=&quot;italiano (it) subtitles&quot; data-mwtitle=&quot;TimedText:Sneak_Preview_-_Wikipedia_VisualEditor.webm.it.srt&quot; data-mwprovider=&quot;local&quot; data-dir=&quot;ltr&quot;/><track src=&quot;https://commons.wikimedia.org/w/index.php?title=TimedText:Sneak_Preview_-_Wikipedia_VisualEditor.webm.ja.srt&amp;amp;action=raw&amp;amp;ctype=text%2Fx-srt&quot; kind=&quot;subtitles&quot; type=&quot;text/x-srt&quot; srclang=&quot;ja&quot; label=&quot;日本語 (ja) subtitles&quot; data-mwtitle=&quot;TimedText:Sneak_Preview_-_Wikipedia_VisualEditor.webm.ja.srt&quot; data-mwprovider=&quot;local&quot; data-dir=&quot;ltr&quot;/><track src=&quot;https://commons.wikimedia.org/w/index.php?title=TimedText:Sneak_Preview_-_Wikipedia_VisualEditor.webm.mt.srt&amp;amp;action=raw&amp;amp;ctype=text%2Fx-srt&quot; kind=&quot;subtitles&quot; type=&quot;text/x-srt&quot; srclang=&quot;mt&quot; label=&quot;Malti (mt) subtitles&quot; data-mwtitle=&quot;TimedText:Sneak_Preview_-_Wikipedia_VisualEditor.webm.mt.srt&quot; data-mwprovider=&quot;local&quot; data-dir=&quot;ltr&quot;/><track src=&quot;https://commons.wikimedia.org/w/index.php?title=TimedText:Sneak_Preview_-_Wikipedia_VisualEditor.webm.nb.srt&amp;amp;action=raw&amp;amp;ctype=text%2Fx-srt&quot; kind=&quot;subtitles&quot; type=&quot;text/x-srt&quot; srclang=&quot;nb&quot; label=&quot;norsk bokmål (nb) subtitles&quot; data-mwtitle=&quot;TimedText:Sneak_Preview_-_Wikipedia_VisualEditor.webm.nb.srt&quot; data-mwprovider=&quot;local&quot; data-dir=&quot;ltr&quot;/><track src=&quot;https://commons.wikimedia.org/w/index.php?title=TimedText:Sneak_Preview_-_Wikipedia_VisualEditor.webm.or.srt&amp;amp;action=raw&amp;amp;ctype=text%2Fx-srt&quot; kind=&quot;subtitles&quot; type=&quot;text/x-srt&quot; srclang=&quot;or&quot; label=&quot;ଓଡ଼ିଆ (or) subtitles&quot; data-mwtitle=&quot;TimedText:Sneak_Preview_-_Wikipedia_VisualEditor.webm.or.srt&quot; data-mwprovider=&quot;local&quot; data-dir=&quot;ltr&quot;/><track src=&quot;https://commons.wikimedia.org/w/index.php?title=TimedText:Sneak_Preview_-_Wikipedia_VisualEditor.webm.pt-br.srt&amp;amp;action=raw&amp;amp;ctype=text%2Fx-srt&quot; kind=&quot;subtitles&quot; type=&quot;text/x-srt&quot; srclang=&quot;pt-br&quot; label=&quot;português do Brasil (pt-br) subtitles&quot; data-mwtitle=&quot;TimedText:Sneak_Preview_-_Wikipedia_VisualEditor.webm.pt-br.srt&quot; data-mwprovider=&quot;local&quot; data-dir=&quot;ltr&quot;/><track src=&quot;https://commons.wikimedia.org/w/index.php?title=TimedText:Sneak_Preview_-_Wikipedia_VisualEditor.webm.pt.srt&amp;amp;action=raw&amp;amp;ctype=text%2Fx-srt&quot; kind=&quot;subtitles&quot; type=&quot;text/x-srt&quot; srclang=&quot;pt&quot; label=&quot;português (pt) subtitles&quot; data-mwtitle=&quot;TimedText:Sneak_Preview_-_Wikipedia_VisualEditor.webm.pt.srt&quot; data-mwprovider=&quot;local&quot; data-dir=&quot;ltr&quot;/><track src=&quot;https://commons.wikimedia.org/w/index.php?title=TimedText:Sneak_Preview_-_Wikipedia_VisualEditor.webm.ru.srt&amp;amp;action=raw&amp;amp;ctype=text%2Fx-srt&quot; kind=&quot;subtitles&quot; type=&quot;text/x-srt&quot; srclang=&quot;ru&quot; label=&quot;русский (ru) subtitles&quot; data-mwtitle=&quot;TimedText:Sneak_Preview_-_Wikipedia_VisualEditor.webm.ru.srt&quot; data-mwprovider=&quot;local&quot; data-dir=&quot;ltr&quot;/><track src=&quot;https://commons.wikimedia.org/w/index.php?title=TimedText:Sneak_Preview_-_Wikipedia_VisualEditor.webm.sv.srt&amp;amp;action=raw&amp;amp;ctype=text%2Fx-srt&quot; kind=&quot;subtitles&quot; type=&quot;text/x-srt&quot; srclang=&quot;sv&quot; label=&quot;svenska (sv) subtitles&quot; data-mwtitle=&quot;TimedText:Sneak_Preview_-_Wikipedia_VisualEditor.webm.sv.srt&quot; data-mwprovider=&quot;local&quot; data-dir=&quot;ltr&quot;/><track src=&quot;https://commons.wikimedia.org/w/index.php?title=TimedText:Sneak_Preview_-_Wikipedia_VisualEditor.webm.tl.srt&amp;amp;action=raw&amp;amp;ctype=text%2Fx-srt&quot; kind=&quot;subtitles&quot; type=&quot;text/x-srt&quot; srclang=&quot;tl&quot; label=&quot;Tagalog (tl) subtitles&quot; data-mwtitle=&quot;TimedText:Sneak_Preview_-_Wikipedia_VisualEditor.webm.tl.srt&quot; data-mwprovider=&quot;local&quot; data-dir=&quot;ltr&quot;/><track src=&quot;https://commons.wikimedia.org/w/index.php?title=TimedText:Sneak_Preview_-_Wikipedia_VisualEditor.webm.uk.srt&amp;amp;action=raw&amp;amp;ctype=text%2Fx-srt&quot; kind=&quot;subtitles&quot; type=&quot;text/x-srt&quot; srclang=&quot;uk&quot; label=&quot;українська (uk) subtitles&quot; data-mwtitle=&quot;TimedText:Sneak_Preview_-_Wikipedia_VisualEditor.webm.uk.srt&quot; data-mwprovider=&quot;local&quot; data-dir=&quot;ltr&quot;/><track src=&quot;https://commons.wikimedia.org/w/index.php?title=TimedText:Sneak_Preview_-_Wikipedia_VisualEditor.webm.vi.srt&amp;amp;action=raw&amp;amp;ctype=text%2Fx-srt&quot; kind=&quot;subtitles&quot; type=&quot;text/x-srt&quot; srclang=&quot;vi&quot; label=&quot;Tiếng Việt (vi) subtitles&quot; data-mwtitle=&quot;TimedText:Sneak_Preview_-_Wikipedia_VisualEditor.webm.vi.srt&quot; data-mwprovider=&quot;local&quot; data-dir=&quot;ltr&quot;/><track src=&quot;https://commons.wikimedia.org/w/index.php?title=TimedText:Sneak_Preview_-_Wikipedia_VisualEditor.webm.zh-cn.srt&amp;amp;action=raw&amp;amp;ctype=text%2Fx-srt&quot; kind=&quot;subtitles&quot; type=&quot;text/x-srt&quot; srclang=&quot;zh-cn&quot; label=&quot;中文(中国大陆)‎ (zh-cn) subtitles&quot; data-mwtitle=&quot;TimedText:Sneak_Preview_-_Wikipedia_VisualEditor.webm.zh-cn.srt&quot; data-mwprovider=&quot;local&quot; data-dir=&quot;ltr&quot;/><track src=&quot;https://commons.wikimedia.org/w/index.php?title=TimedText:Sneak_Preview_-_Wikipedia_VisualEditor.webm.zh-tw.srt&amp;amp;action=raw&amp;amp;ctype=text%2Fx-srt&quot; kind=&quot;subtitles&quot; type=&quot;text/x-srt&quot; srclang=&quot;zh-tw&quot; label=&quot;中文(台灣)‎ (zh-tw) subtitles&quot; data-mwtitle=&quot;TimedText:Sneak_Preview_-_Wikipedia_VisualEditor.webm.zh-tw.srt&quot; data-mwprovider=&quot;local&quot; data-dir=&quot;ltr&quot;/><track src=&quot;https://commons.wikimedia.org/w/index.php?title=TimedText:Sneak_Preview_-_Wikipedia_VisualEditor.webm.zh.srt&amp;amp;action=raw&amp;amp;ctype=text%2Fx-srt&quot; kind=&quot;subtitles&quot; type=&quot;text/x-srt&quot; srclang=&quot;zh&quot; label=&quot;中文 (zh) subtitles&quot; data-mwtitle=&quot;TimedText:Sneak_Preview_-_Wikipedia_VisualEditor.webm.zh.srt&quot; data-mwprovider=&quot;local&quot; data-dir=&quot;ltr&quot;/></video></div>">
	<img alt="File:Sneak Preview - Wikipedia VisualEditor.webm" style="width:450px;height:253px"
		src="https://upload.wikimedia.org/wikipedia/commons/thumb/c/c8/Sneak_Preview_-_Wikipedia_VisualEditor.webm/450px--Sneak_Preview_-_Wikipedia_VisualEditor.webm.jpg">
	<a href="https://upload.wikimedia.org/wikipedia/commons/c/c8/Sneak_Preview_-_Wikipedia_VisualEditor.webm"title="Play media" target="new">
		<span class="play-btn-large">
			<span class="mw-tmh-playtext">Play media</span>
		</span>
	</a>
</div>

Parser HTML, 2022: 16,575 bytes

<div id="mwe_player_0" class="PopUpMediaTransform" style="width:450px;"
	videopayload="<div class=&quot;mediaContainer&quot; style=&quot;width:854px&quot;><video id=&quot;mwe_player_1&quot; poster=&quot;//upload.wikimedia.org/wikipedia/commons/thumb/c/c8/Sneak_Preview_-_Wikipedia_VisualEditor.webm/854px--Sneak_Preview_-_Wikipedia_VisualEditor.webm.jpg&quot; controls=&quot;&quot; preload=&quot;none&quot; autoplay=&quot;&quot; style=&quot;width:854px;height:480px&quot; class=&quot;kskin&quot; data-durationhint=&quot;61.068&quot; data-startoffset=&quot;0&quot; data-mwtitle=&quot;Sneak_Preview_-_Wikipedia_VisualEditor.webm&quot; data-mwprovider=&quot;wikimediacommons&quot;><source src=&quot;//upload.wikimedia.org/wikipedia/commons/transcoded/c/c8/Sneak_Preview_-_Wikipedia_VisualEditor.webm/Sneak_Preview_-_Wikipedia_VisualEditor.webm.480p.vp9.webm&quot; type=&quot;video/webm; codecs=&amp;quot;vp9, opus&amp;quot;&quot; data-title=&quot;SD VP9 (480P)&quot; data-shorttitle=&quot;VP9 480P&quot; data-transcodekey=&quot;480p.vp9.webm&quot; data-width=&quot;854&quot; data-height=&quot;480&quot; data-bandwidth=&quot;776312&quot; data-framerate=&quot;23.976&quot;/><source src=&quot;//upload.wikimedia.org/wikipedia/commons/transcoded/c/c8/Sneak_Preview_-_Wikipedia_VisualEditor.webm/Sneak_Preview_-_Wikipedia_VisualEditor.webm.480p.webm&quot; type=&quot;video/webm; codecs=&amp;quot;vp8, vorbis&amp;quot;&quot; data-title=&quot;SD WebM (480P)&quot; data-shorttitle=&quot;WebM 480P&quot; data-transcodekey=&quot;480p.webm&quot; data-width=&quot;854&quot; data-height=&quot;480&quot; data-bandwidth=&quot;1088376&quot; data-framerate=&quot;23.976&quot;/><source src=&quot;//upload.wikimedia.org/wikipedia/commons/transcoded/c/c8/Sneak_Preview_-_Wikipedia_VisualEditor.webm/Sneak_Preview_-_Wikipedia_VisualEditor.webm.720p.vp9.webm&quot; type=&quot;video/webm; codecs=&amp;quot;vp9, opus&amp;quot;&quot; data-title=&quot;HD VP9 (720P)&quot; data-shorttitle=&quot;VP9 720P&quot; data-transcodekey=&quot;720p.vp9.webm&quot; data-width=&quot;1280&quot; data-height=&quot;720&quot; 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</video>

Main drivers of bloat seem to be different formats available, and different subtitles.

Event Timeline

In IRC we suggested degrading the experience for non-JS clients to have only one set of subtitles (page content language?) and one video resolution (biggest?), and fetching the rest of the data async via JS after the page is painted.

Once we're able to move to MPEG-DASH streaming we could have one or two progressive-download sources at a reasonable default resolution, plus the MPEG-DASH manifest listed as first source. We might be able to shove the timed text track references into the .mpd manifest too, though that would mean they don't work with JavaScript disabled.

In T199129#4585056, @brion wrote:

Once we're able to move to MPEG-DASH streaming we could have one or two progressive-download sources at a reasonable default resolution, plus the MPEG-DASH manifest listed as first source.

Neat. That's T44591, right?

We might be able to shove the timed text track references into the .mpd manifest too, though that would mean they don't work with JavaScript disabled.

Given the size impact, what do you think about only shipping the content language i18n to non-JS users and the rest are in the manifest?

Change 752364 had a related patch set uploaded (by TheDJ; author: TheDJ):

[mediawiki/extensions/TimedMediaHandler@master] WIP: Only add 1 texttrack to the html

https://gerrit.wikimedia.org/r/752364

@brion love to hear what you think of my idea to only include the default translation for the subtitles in the HTML and load the others via Javascript

Have updated the example HTML outputs here; the growth is formats (VP9 is now available), and for Parsoid partially offset by the changes to the <track> output:

BeforeΔAfter
<track=<track
kind="subtitles"= kind="subtitles"
type="text/x-srt"= type="text/x-srt"
src="https://commons.wikimedia.org/w/index.php?title=TimedText:Sneak_Preview_-_Wikipedia_VisualEditor.webm.bn.srt&amp;action=raw&amp;ctype=text%2Fx-srt"+ src="https://commons.wikimedia.org/w/api.php?action=timedtext&amp;title=File%3ASneak_Preview_-_Wikipedia_VisualEditor.webm&amp;lang=bn&amp;trackformat=srt&amp;origin=%2A"
srclang="bn"= srclang="bn"
label="বাংলা (bn) subtitles"- label="বাংলা ‪(bn)‬"
data-mwtitle="TimedText:Sneak_Preview_-_Wikipedia_VisualEditor.webm.bn.srt"- data-mwtitle=""
data-dir="ltr"= data-dir="ltr"
id="mwDQ">= id="mwEw">

Once videojs is rolled out, there are certainly some things we can work on to reduce the size. I personally think:

  • We should just drop some of the sizes for VP8. (160p, 360p and 720p seems like enough VP8 to me)
  • data-title and data-short title are things to look at. They were for kaltura player, maybe we no longer need them
  • We should consider removing the original version of the file (as they tend to have lots of problems with profile conformity etc)
  • We can dump all but the default text tracks like I suggested
  • The duration and bandwidth numbers can have very long floating point numbers, which we can trim

@brion do you agree with this ? I don't think we need any of these attributes any longerl. At most perhaps the data-width/height one if we ever want to auto select a lower resolution for inline playback perhaps, like we used to do in the past ?

Remove from <source>

  • data-bandwidth
  • data-framerate
  • data-width
  • data-height
  • data-title
  • data-shortitle

Add to vjsplayer a function that uses data-transcodekey to retrieve and generate data-title and data-shorttitle for the resolution switcher menu.

Change 929792 had a related patch set uploaded (by TheDJ; author: TheDJ):

[mediawiki/extensions/TimedMediaHandler@master] Remove unused data attribs on a/v sources

https://gerrit.wikimedia.org/r/929792

Change 929792 merged by jenkins-bot:

[mediawiki/extensions/TimedMediaHandler@master] Remove unused data attribs on a/v sources

https://gerrit.wikimedia.org/r/929792

Change 931085 had a related patch set uploaded (by Jforrester; author: TheDJ):

[mediawiki/extensions/TimedMediaHandler@wmf/1.41.0-wmf.13] Remove unused data attribs on a/v sources

https://gerrit.wikimedia.org/r/931085

Change 931085 merged by jenkins-bot:

[mediawiki/extensions/TimedMediaHandler@wmf/1.41.0-wmf.13] Remove unused data attribs on a/v sources

https://gerrit.wikimedia.org/r/931085

Mentioned in SAL (#wikimedia-operations) [2023-06-20T21:00:08Z] <tgr@deploy1002> Started scap: Backport for [[gerrit:931085|Remove unused data attribs on a/v sources (T199129)]]

Mentioned in SAL (#wikimedia-operations) [2023-06-20T21:01:30Z] <tgr@deploy1002> jforrester and tgr: Backport for [[gerrit:931085|Remove unused data attribs on a/v sources (T199129)]] synced to the testservers: mwdebug1001.eqiad.wmnet, mwdebug2001.codfw.wmnet, mwdebug1002.eqiad.wmnet, mwdebug2002.codfw.wmnet

Mentioned in SAL (#wikimedia-operations) [2023-06-20T21:18:53Z] <tgr@deploy1002> Finished scap: Backport for [[gerrit:931085|Remove unused data attribs on a/v sources (T199129)]] (duration: 18m 45s)

Change 933173 had a related patch set uploaded (by TheDJ; author: TheDJ):

[mediawiki/extensions/TimedMediaHandler@master] Reduce TMH html footprint

https://gerrit.wikimedia.org/r/933173

Change 933174 had a related patch set uploaded (by TheDJ; author: TheDJ):

[mediawiki/extensions/TimedMediaHandler@master] Remove message keys which are no longer in use

https://gerrit.wikimedia.org/r/933174

Change 933177 had a related patch set uploaded (by Arlolra; author: Arlolra):

[mediawiki/services/parsoid@master] Remove attributes deprecated in TMH

https://gerrit.wikimedia.org/r/933177

@brion would you be able to review https://gerrit.wikimedia.org/r/c/mediawiki/extensions/TimedMediaHandler/+/933173 ? It seems like a good change and has been sitting in Gerrit for a while.

Change 933173 merged by jenkins-bot:

[mediawiki/extensions/TimedMediaHandler@master] Reduce TMH html footprint

https://gerrit.wikimedia.org/r/933173

Change 933177 merged by jenkins-bot:

[mediawiki/services/parsoid@master] Remove attributes deprecated in TMH

https://gerrit.wikimedia.org/r/933177

Change 962706 had a related patch set uploaded (by C. Scott Ananian; author: C. Scott Ananian):

[mediawiki/vendor@master] Bump wikimedia/parsoid to 0.18.0-a26

https://gerrit.wikimedia.org/r/962706

Change 962706 merged by jenkins-bot:

[mediawiki/vendor@master] Bump wikimedia/parsoid to 0.18.0-a26

https://gerrit.wikimedia.org/r/962706

Change 933174 merged by jenkins-bot:

[mediawiki/extensions/TimedMediaHandler@master] Remove message keys which are no longer in use

https://gerrit.wikimedia.org/r/933174

TheDJ claimed this task.